CN212432909U - Device for measuring concentration value of particulate matter in gas on site - Google Patents
Device for measuring concentration value of particulate matter in gas on site Download PDFInfo
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- CN212432909U CN212432909U CN202021545409.9U CN202021545409U CN212432909U CN 212432909 U CN212432909 U CN 212432909U CN 202021545409 U CN202021545409 U CN 202021545409U CN 212432909 U CN212432909 U CN 212432909U
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- 239000013618 particulate matter Substances 0.000 title claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000005070 sampling Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 238000012625 in-situ measurement Methods 0.000 claims description 7
- 230000005250 beta ray Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 13
- 239000003546 flue gas Substances 0.000 abstract description 13
- 239000007788 liquid Substances 0.000 abstract description 9
- 239000000428 dust Substances 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000012795 verification Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The application discloses device of particulate matter concentration numerical value in gas is measured on spot includes: the gas-liquid separator comprises a gas inlet pipe, a heating device communicated with the gas inlet pipe, a sensor communicated with the heating device, a flow meter communicated with the sensor and a gas outlet nozzle communicated with the flow meter; and a pitot tube is also connected to the heating device. This device can be accurate measure the concentration and the flue gas velocity of flow of particulate matter in the flue gas, and the comparison of the flue gas emission of being convenient for carries out accurate verification to the work efficiency of the equipment of some dust removers and SOx/NOx control producer to and reliability, the feasibility of environmental protection law enforcement data.
Description
Technical Field
The present disclosure relates generally to the field of concentration measurement technologies, and more particularly to an apparatus for measuring a concentration value of particulate matter in a gas on-site.
Background
In the test of a fixed pollution source, the final test result can be directly influenced by the liquid drops in the super-saturated high-humidity environment. The critical value of the super-saturated water mist is different in gases with different temperatures. The amount of gaseous water that exceeds a critical value, which is changed to liquid water, cannot be accurately measured by the prior art. In the prior art, there are mainly two test methods: 1. smoke dust test: the front end is heated to prevent the test from being influenced by the condensed water; the method has the defect that the moisture content cannot be accurately measured in a super-saturated high-humidity environment, so that the concentration calculation is influenced. 2. Testing smoke gas: the front end is heated and condensed to remove the interference of water; the method has the disadvantages that the pressure and the temperature of the gas to be measured are changed, and the actual content of the gas to be measured cannot be really measured. Therefore, the concentration of particulate matters in the flue gas and the flow rate of the flue gas cannot be accurately measured by the prior art.
Disclosure of Invention
In view of the above-mentioned shortcomings or drawbacks of the prior art, it is desirable to provide an apparatus for measuring a value of a concentration of particulate matter in a gas on-site.
An apparatus for in situ measurement of a concentration of particulate matter in a gas, comprising: the gas-liquid separator comprises a gas inlet pipe, a heating device communicated with the gas inlet pipe, a sensor communicated with the heating device, a flow meter communicated with the sensor and a gas outlet nozzle communicated with the flow meter; and a pitot tube is also connected to the heating device.
According to the technical scheme provided by the embodiment of the application, the method further comprises the following steps: the sampling device comprises a water-gas separator communicated with the air outlet nozzle, a sampling pump connected with the water-gas separator and a controller.
According to the technical scheme provided by the embodiment of the application, the heating device comprises a heating pipe with a hollow interior and a heater arranged in the heating pipe.
According to the technical scheme provided by the embodiment of the application, the controller is electrically connected with the sensor, the flowmeter and the sampling pump.
According to the technical scheme provided by the embodiment of the application, the sensor is a beta ray sensor, and the flowmeter is an orifice plate flowmeter.
In summary, according to the technical scheme of the application, the gas is heated in the whole process, and then the concentration of the particulate matter is measured by matching with the pitot tube and the sensor; when the device is used, super-saturated humidity gas is introduced from the gas inlet pipe, the gas flow rate is calculated through pitot tube measurement, and the gas flow is calculated according to the diameter of the gas inlet pipe; the gas is heated in the whole process through the heating device, so that the saturated liquid drops are fully vaporized and then enter the sensor to measure the concentration of the particulate matters; and then, calculating expansion coefficients of the gas and the liquid drops according to the front and back flow difference values through a flowmeter, and finally calculating the real particle concentration and the smoke concentration by using the coefficient for dynamic compensation. This device can be accurate measure the concentration and the flue gas concentration of particulate matter in the flue gas, and the comparison of the flue gas emission of being convenient for carries out accurate verification to the work efficiency of the equipment of some dust removers and SOx/NOx control producer to and reliability, the feasibility of environmental protection law enforcement data.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of the present application;
fig. 2-3 are schematic views of the present application showing a partially enlarged structure.
Reference numbers in the figures: 1. an air inlet pipe; 2. a heating device; 3. a sensor; 4. a flow meter; 5. an air outlet nozzle; 6. a pitot tube.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
An apparatus for in situ measurement of a concentration of particulate matter in a gas, comprising: the device comprises an air inlet pipe 1, a heating device 2 communicated with the air inlet pipe 1, a sensor 3 communicated with the heating device 2, a flow meter 4 communicated with the sensor 3 and an air outlet nozzle 5 communicated with the flow meter 4; a pitot tube 6 is also connected to the heating device 2.
The critical values of the super-saturated water mist in gases with different temperatures are different; however, the amount of gaseous water that exceeds the critical value is changed into liquid water, and the existing technology cannot accurately measure the amount. The influence of the liquid state of the unknown amount of water on the smoke concentration calculation can be eliminated by changing the liquid state of the unknown amount of water into the gas state and enabling the dynamic coefficient of the volume change of the unknown amount of water to participate in the smoke concentration calculation, and the method is the only method for solving the problem that the supersaturated water mist influences the detection value of the concentration of the particulate matters in the gas.
When the device is used, supersaturated humidity gas is introduced from the gas inlet pipe 1, the gas flow rate is measured and calculated through the pitot tube 6 at the gas inlet pipe 1, meanwhile, the gas flow is calculated according to the diameter of the gas inlet pipe 1, then the gas is heated in the whole process through the heating device 2, so that saturated liquid drops are fully vaporized, and then the gas enters the sensor 3 to measure the concentration of particulate matters; then, the expansion coefficients of the gas and the liquid drops are calculated through the flowmeter 4 according to the difference value of the front flow and the rear flow, the coefficients are used for dynamic compensation, and finally the real particulate matter concentration and the flue gas flow speed are calculated, wherein the partial calculation process is as follows:
Cconcentration of＝(mDust (B)+mWater (W))/VQi (Qi) ①
CConcentration of＝mDust (B)/(VQi (Qi)+1244Vm water) ②
A formula I; the expansion coefficient of water is not taken into account,
in the formula II, the expansion coefficient of water is considered when the water is completely vaporized, and the real volume of the flue gas is calculated by utilizing the expansion coefficient of the water.
This device can be accurate measure the concentration and the flue gas velocity of flow of particulate matter in the flue gas, and the comparison of the flue gas emission of being convenient for carries out accurate verification to the work efficiency of the equipment of some dust removers and SOx/NOx control producer to and reliability, the feasibility of environmental protection law enforcement data.
In order to further optimize the above technical solution, the technical solution is preferably further provided with the following improvements: further comprising: the water-gas separator is communicated with the air outlet nozzle 5, and the sampling pump and the controller are connected with the water-gas separator. The moisture separator separates the generated moisture from the air, the sampling pump is used for sucking the air into the air inlet pipe 1, and the controller can conveniently control the sampling pump, the heating device 2 and the sensor 3
In order to further optimize the above technical solution, the technical solution is preferably further provided with the following improvements: the heating device 2 comprises a heating pipe with a hollow inner part and a heater arranged in the heating pipe. Wherein, the heater can be a heating rod or a heating belt.
In order to further optimize the above technical solution, the technical solution is preferably further provided with the following improvements: the controller is electrically connected to the sensor 3, the flow meter 4 and the sampling pump.
The sampling pump can suck gas into the air inlet pipe 1 from the air, and the gas flowing out of the air outlet nozzle 5 is subjected to water-gas separation through the water-gas separator; the controller is capable of controlling the sensor 3, the flow meter 4 and the sampling pump while receiving and processing signals of the sensor 3 and the flow meter 4.
In order to further optimize the above technical solution, the technical solution is preferably further provided with the following improvements: the sensor 3 is a beta ray sensor 3, and the flowmeter 4 is an orifice flowmeter 4.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (5)
1. An apparatus for in situ measurement of a concentration of particulate matter in a gas, comprising: the method comprises the following steps: the device comprises an air inlet pipe (1), a heating device (2) communicated with the air inlet pipe (1), a sensor (3) communicated with the heating device (2), a flowmeter (4) communicated with the sensor (3), and an air outlet nozzle (5) communicated with the flowmeter (4); the heating device (2) is also connected with a pitot tube (6).
2. An apparatus for in situ measurement of a concentration of particulate matter in a gas as claimed in claim 1 wherein: further comprising: the water-gas separator is communicated with the air outlet nozzle (5), and the sampling pump and the controller are connected with the water-gas separator.
3. An apparatus for in situ measurement of a concentration of particulate matter in a gas as claimed in claim 1 wherein: the heating device (2) comprises a heating pipe with a hollow inner part and a heater arranged in the heating pipe.
4. An apparatus for in situ measurement of a concentration of particulate matter in a gas as claimed in claim 2, wherein: the controller is electrically connected with the sensor (3), the flowmeter (4) and the sampling pump.
5. An apparatus for in situ measurement of a concentration of particulate matter in a gas as claimed in claim 1 wherein: the sensor (3) is a beta ray sensor (3), and the flowmeter (4) is a pore plate flowmeter (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021545409.9U CN212432909U (en) | 2020-07-30 | 2020-07-30 | Device for measuring concentration value of particulate matter in gas on site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021545409.9U CN212432909U (en) | 2020-07-30 | 2020-07-30 | Device for measuring concentration value of particulate matter in gas on site |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212432909U true CN212432909U (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021545409.9U Active CN212432909U (en) | 2020-07-30 | 2020-07-30 | Device for measuring concentration value of particulate matter in gas on site |
Country Status (1)
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| CN (1) | CN212432909U (en) |
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2020
- 2020-07-30 CN CN202021545409.9U patent/CN212432909U/en active Active
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A device for measuring the concentration of particulate matter in gas on the spot Effective date of registration: 20231222 Granted publication date: 20210129 Pledgee: Hebei Bazhou Rural Commercial Bank Co.,Ltd. Pledgor: BAZHOU DIHAI YUNTIAN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Registration number: Y2023980073545 |
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